Photos

Runners cross the Verrazano-Narrows Bridge shortly after the start of the New York City Marathon in New York in this November 2, 2014 file photo. With spring just weeks away and as men and women begin training for upcoming marathons, research shows the sexes are naturally conditioned to run the endurance races differently. In a study published in the journal Medicine & Science in Sports & Exercise, scientists who studied runners in 14 marathons found that women who tackle the 26.2-mile (42-km) race pace themselves more evenly than men. REUTERS/Lucas Jackson/Files (UNITED STATES - Tags: SPORT ATHLETICS HEALTH SOCIETY)